Steam generator



Oct. 19 5 1926. I 1,603,685

G. GAYDos STEAM GENERATOR Filed May 6, 1925 QW/f7 3mm/H06:

Patented @et i9, i926.

STEAM GENERATOR.

Application lcd May 6,

'llhis invention relates to steam generators ot relatively small sizeand particularly to generators adapted to supply steam te cloth steaming; apparatus such as used in tailor 5 shops.

Objects of the invention are to simplify the construction ot general-ors ot the type stated and to provide an ci'licient and reliable generator of small sir/ie and relatively l large capacity. lli/lore specifically, au object is to provide a compact generator having a steam boiler surrounded by an annular water reservoir in which the water is preheated.

Apparatus .embodying the .invention is illustrated in the accompanying` drawings7 in which the ligure a vertical central section through the steam generator, certain ot the parts however being shown in elevation.

ln the embodiment illustrated, the nu- .meral l indicates the supporting;` base which is preferably a triangular shaped plate or casting' carrying' three vertically disposed standards 2 and supporting; a gas burner A casina` 4- is lixed to the standards 2 and is provided with inwardly extending' Aflanges 5 arranged at or below the level ot the burner top, suitable openings G being provided at the lower end of the casing to insure an adequate supply of secondaryair iter the burner. The stamlards 2 carry brackets 7 upon which rests a spider 8, upon which in turn rests the flange or enlargement 9 or a vertically disposed cylindrical boiler 10. rllhe steam outlet pipe 11 projects above and axially oit the boiler and is provided with a nely perforated extension 12 within the boiler, the latter acting as a water separator which prevents particles et water from entering' the steam pipe. The boiler l() is of such diameter that the sides thereof are spaced from the standards 2 and a water vcoil 13 surrounds the lower part oi the boiler, communicating therewith at the lower end thereof and at a point intermediate the saine.

As the boiler is intended 'for use in connection with cloth steaming operations or :tor other purposes in which there is an intermittent demand "for large quantities of steam, the boiler holds a comparatively small quantity of water and it is necessary to provide a water reservoir i'or periodically replenishing the water in the boiler. rllhe water reservoir comprises an annular tank l1925. Serial No. 28,457.

having a bottom wall 14C which rests upon the outwardly turned flange 15 provided by the top edge of the casing l. rlhe outer wall 1S ot' the reservoir terminates well below the lower end of the water trap 12 oi, :the steam pipe, but the inner wall 17 of the reservoir which lies against the standards 2 is extended upwardly to the top of .the boiler l() and serves asa casing ior the upper portion ol: the steam generator. lllater may be supplied from the reservoir to the boiler through a pipe 18 which extends from the bottom of the reservoir to the lowerend of the water coil 1B when the fuel supply pipe 19 is closed. As the water reservoir is' under atmopheric pressure, this simultaneous control o'l' the water and ituel supply is essential as `the pressure within the boiler while the steam is being' generated would Yprevent the inflow of water and might force the boiler iif'ater and steam into the reservoir. The simultaneous control is `advantageously secured by providing` a valve casing 20ihaving Spaced passages under the control ot asingle valve cock .21 the passages comprising por-L tions of the water feed line 1S and the gas iced line 19, respectively. The valve cock and casing are so arranged that one passage,

to: instance the water passageywill close before the other or passage opens. The i gas line is provided with a .main valve 19, and a pilot llame is of course provided by a pipe 22 which may tap the .line 11S) between the valve casing andthe `gas supply, or which may be `ted through.the.casing- :1

by a small by-pass. The water supply pipe 18 ispre'ferably providedrwith a draincock 23.

A tripod 24E joins the upper ends of the standards 2 to hold them in lined position and carries a sleeve 25 through which the steam pipe 11 passes. The standards 2 eX- tend above the outer ends of the tripod 24: and support a conical cover 26, the cover 'being held in place by a cowl 27 and nut 28 which is threaded upon the sleeve 25. The cover 26 terminates in a depending iange 27;L which drops below the upper end of the casing,` 17, the cover and flange being spaced from the casing to permit the escape of products ot combustion.

rlhe casing 4l, inner wall-17 and the cover 26 may be provided with linings 29 of asbestes or other heat insulating material.

As illustrated7 steam is supplied through pipe 11 to a cloth steamer 30, but the generator may be used in connection with other apparatus.

rlhe steam generator is placed in operation by turning the valve cock 21 to supply fuel to the burner. @rdinarily the water in the boiler is already heated and a rapid generation of steam results, the steam passing out of the pipe 11, tree 'from water, to the cloth steamer. Villien the steaming operation is completed, the cock 21 is turned to extinguish the lame, and when desired the `rotation of the cock is continued to open the water line 18. rlhe reservoir water pre heated by conduction through the wall of the casing 17, flows into the boiler through the lower end ot the water coil 13. As the steam pressure will all rapidly when the heat is cut oli, water flows into the boiler but cannot flood the same since the top ot the reservoir is below the level ot the top oit the boiler. The annular shape of the reservoir permits the holding in reserve ot a large quantity oi preheated water, without, however, any risk et introducing too much water into the boiler. rlllhe arrangement et the water feed line 18 and the single controlling valve permits a very simple arrangement and construction ot the gcnerator, resulting in a compact, enclosed structure.

It will be apparent that the invention is not limited to the embodiment herein illustrated and described, since, for example, the supporting framework and the specific construction of the valve may be varied considerably without departing from the spirit of the invention. rlhese and many other changes in the parts, their relative size, shape and location, are to be understood as falling within the scope of the following claims.

I claim:

l. A steam generator comprising a boiler and a iuel burner beneath the same, means supporting said boiler and burner, a water reservoir open to atmospheric pressure, and

a water pipe connecting said boiler and reservoir, a valve in said connecting pipe, said reservoir circumscribing said boiler and spaced therefrom to provide a passage for the products of combustion, whereby the water supply in said reservoir is preheated betere reaching said boiler.

2. A steam generator as claimed in claim 1, wherein said boiler is provided at the top thereof with a steam outlet pipe, the entrance to which is positioned above the level ol' the top of said reservoir.

3. A steam generator comprising a supporting frame, a. vertically disposed cylindrical boiler carried thereby, a burner beneath said boiler, a water coil surrounding` said boiler and communicating therewith at the lower end thereotI and at a point above the lower end, a water reservoir under atmospheric pressure, a water pipe connecting said reservoir and the lower end ot said water coil, a fuel supply pipe for said burner, and valve means closing said water pipe when said fuel pipe is open, said valve means comprising a valve casing having spaced passages through which the water supply and the fuel supply, respectively, .must pass-1, and a valve in said casing operative to close one or" said passages before the other is opened.

et. A steam generator comprising verti" cally disposed standards, a boiler within and spaced trom said standards, a water coil at the lower ond oitI said boiler, a fuel burner beneath said boilerI and coil, an annular water reservoir carried by and outside ot said standards, the inner wall of said reservoir extending above the same and above said boiler, a flanged cover supported from said standards and spaced from the top ot said inner wall to provide an outlet for the products ot combustion, and a steam pipe extending upwardly from said boiler and passing through said cover.

ln testimony whereof, l aflix my signature.

GEORGE GAYDOS. 

